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BUSINESS SEGMENT INFORMATION (Tables) | 3 Months Ended
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Mar. 31, 2019
Segment Reporting [Abstract] |
Summary of Segment Reporting Information by Segment | The following table is a summary of segment information for the three months ended March 31, 2019 and 2018. Segment asset information is not presented since it is not used by the CODM at the operating segment level. Operating earnings (loss) of each segment represents net revenues less directly identifiable expenses to arrive at operating income (loss) for the segment. General corporate activities included in the table below are comprised of general management and administrative corporate expenses, amortization and impairment of intangibles assets and other operating income and expenses, net of certain general corporate activity costs that are allocated to the DIS and DS businesses. The accounting policies of the segments are the same as those of the Company as set forth in Note 2 to the consolidated financial statements contained in the Company’s 2018 Annual Report on Form 10-K and Note 2 to the interim unaudited consolidated financial statements.
| Three Months Ended March 31,
| 2019 |  | 2018
Net revenues: |  |  |  |  |
DIS business | $ | 1,812 |  |  | $ | 1,803 |
All other operating segments | 79 |  |  | 81 |
Total net revenues | $ | 1,891 |  |  | $ | 1,884 |
Operating earnings (loss): |  |  |  |  |
DIS business | $ | 280 |  |  | $ | 308 |
All other operating segments | 9 |  |  | 11 |
General corporate activities | (41 | ) |  | (47 | )
Total operating income | 248 |  |  | 272 |
Non-operating expenses, net | (35 | ) |  | (43 | )
Income before income taxes and equity in earnings of equity method investees | 213 |  |  | 229 |
Income tax expense | (50 | ) |  | (52 | )
Equity in earnings of equity method investees, net of taxes | 13 |  |  | 12 |
Net income | 176 |  |  | 189 |
Less: Net income attributable to noncontrolling interests | 12 |  |  | 12 |
Net income attributable to Quest Diagnostics | $ | 164 |  |  | $ | 177 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8736-108599 + Details
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